Steady-State Operation of Islanded Distribution Network with PV and Wind Generation

Energy management for islanded and small active distribution networks is more and more challenging due to intermittent distributed energy resource (DER) penetration increase. To this purpose, an optimisation-based framework in a co-simulation environment for the optimal steady-state operation of DERs integrated into small and islanded active distribution networks is proposed in this work. In particular, the optimal daily dispatch of DERs (i.e. wind turbine and photovoltaic), along with a battery energy storage system, is carried out to reduce biofuel consumption. The procedure is developed in Python and DIgSILENT PowerFactory for modelling and optimising system operation, while exploiting the quasi-dynamic simulation toolbox for better representing the network behaviour over daily time horizon. The approach is applied to a modified version of CIGRE Task Force C6.04 network and tested in three scenarios for evaluating the impacts of different DER level productions. The results showcase the potential for real-world application, and highlight significant improvements in DER management, contributing to enhance the operation of small active distribution networks.